primer problems need wisdom!

[tiller]

soo i recently started shooting my remington 700 sps tactical in .223 rem


i worked up some reloads just to fire form brass and break in the barrel

the load was

LC09 brass
wsr primer
26 grains of varget
55 grain hp tnt(speer)

now i know i seated all my primers under the rim of the base, but they seem to be pushing out! this is the first time firing this rifle. but not my first 223 reloads... i have loaded thousands of rounds for my ar without ever seeing a problem like this?

i need some veteran wisdom to tell me whats going on! i dont think i flattened them?? idk?














what primers look like before firing

[kurac]

sometimes that happens with light loads.

[tiller]

im at the max load in my hornady book and in the middle in my speer??

[E_Shaw90]

That is a sign of over pressure. Start with the min load and work up looking for signs of pressure. I would pull the remaining rounds down and start over.

[tiller]

That is a sign of over pressure. Start with the min load and work up looking for signs of pressure. I would pull the remaining rounds down and start over.

ook will do! did they push out because of the pressure?? i checked each neck after firing and everything looked fine

[gunnerstuff]

Not a hot load, there is no primer flow. Just a push back of the primer. Mostly light load. Also shoulder setback too far and the brass was too far forward in the chamber when fired. Check your resizing die, and shoulder dimensions. If that is not the problem, check the chamber dimensions and/or bolt.

[tiller]

Not a hot load, there is no primer flow. Just a push back of the primer. Mostly light load. Also shoulder setback too far and the brass was too far forward in the chamber when fired. Check your resizing die, and shoulder dimensions. If that is not the problem, check the chamber dimensions and/or bolt.

no primer flow?? brass was full length sized...

and how do i check shoulder/chamber dimensions?

and what about the bolt?


im very green to loading for bolt guns!!

[EL_NinO619]

no primer flow?? brass was full length sized...

and how do i check shoulder/chamber dimensions?

and what about the bolt?


im very green to loading for bolt guns!!

Doesn't really matter between bolt guns and semi so to say. But I am with gunner. It does not look like OP. It could even be a worn out PP and lose chamber.

[tiller]

Doesn't really matter between bolt guns and semi so to say. But I am with gunner. It does not look like OP. It could even be a worn out PP and lose chamber.

the brass i swaged??? when inserting primer in these it almost felt tooo easy??

could that be it?

[rg1]

You have to be pushing the shoulder back too much. Looks like about .006 " too much shoulder setback when sizing. You need a case headspace gauge such as the RCBS Precision Mic or Hornady's headspace gauge set to measure the amount you push the shoulder back when sizing. With hot loads the brass will expand back and reseat the primer flush but with mild to mid range loads the case will stay forward in the chamber. The firing pin will push the case forward until the shoulder contacts the front of the chamber, case expands and grips the chamber and the primer is pushed back against the bolt the amount of excess headspace. Had a bad undersized shellholder many years ago for .223 and had primers backing out the exact amount the shellholder was short. Several good youtube videos on using the RCBS and Hornady headspace gauges found by searching Google for "using a Hornady Headspace gauge" or RCBS Precision Mic. Only thing is that your brass is oversized and will still measure short. Some simply take a fired case an adjust their sizing die down a little at a time until the bolt will just close with no resistance. Again you'd need cases that don't have the shoulder pushed back too far already.

[tiller]

You have to be pushing the shoulder back too much. Looks like about .006 " too much shoulder setback when sizing. You need a case headspace gauge such as the RCBS Precision Mic or Hornady's headspace gauge set to measure the amount you push the shoulder back when sizing. With hot loads the brass will expand back and reseat the primer flush but with mild to mid range loads the case will stay forward in the chamber. The firing pin will push the case forward until the shoulder contacts the front of the chamber, case expands and grips the chamber and the primer is pushed back against the bolt the amount of excess headspace. Had a bad undersized shellholder many years ago for .223 and had primers backing out the exact amount the shellholder was short.

thanks for explaining it!!

the brass was periodically checked with case gauge... fit fine...

ook and can you explain shoulder set back?? ive never really understood this... should be neck sizing after my first firings too and not full length sizing? i read that people say "bump the shoulder back" but never understood it??

is there a video that explains it?

[blockfort]

Might be a stuck ejector. The case would get stopped, but the primer could move back.

[NoNOS67]

What press, die, and shell holder are you using?

[tiller]

Brass was processed on a 1050 with dillon full length die

Andthe gun is brand new... Those were the first rounds shot threw it.. How does the ejector get stuck? It still pulled shells out and ejected them

[gunnerstuff]

I would get my hands on some factory loads and see if the same thing happens. Make sure its not mil brass with crimped/sealed primers. Need to start separating gun problems from reload issues. Rg1 good explanation!